treewide: introduce osbase package and move things around

All except localregistry moved from metropolis/pkg to osbase,
localregistry moved to metropolis/test as its only used there anyway.

Change-Id: If1a4bf377364bef0ac23169e1b90379c71b06d72
Reviewed-on: https://review.monogon.dev/c/monogon/+/3079
Tested-by: Jenkins CI
Reviewed-by: Serge Bazanski <serge@monogon.tech>
diff --git a/metropolis/test/util/BUILD.bazel b/metropolis/test/util/BUILD.bazel
index 00790a2..3603daf 100644
--- a/metropolis/test/util/BUILD.bazel
+++ b/metropolis/test/util/BUILD.bazel
@@ -12,10 +12,10 @@
     deps = [
         "//metropolis/node/core/curator/proto/api",
         "//metropolis/node/core/identity",
-        "//metropolis/pkg/event/memory",
-        "//metropolis/pkg/pki",
         "//metropolis/proto/common",
-        "//metropolis/test/launch",
+        "//osbase/event/memory",
+        "//osbase/pki",
+        "//osbase/test/launch",
         "@com_zx2c4_golang_wireguard_wgctrl//wgtypes",
         "@org_golang_google_grpc//:go_default_library",
         "@org_golang_google_grpc//credentials/insecure",
diff --git a/metropolis/test/util/curator.go b/metropolis/test/util/curator.go
index 39b2610..28fa7b1 100644
--- a/metropolis/test/util/curator.go
+++ b/metropolis/test/util/curator.go
@@ -13,7 +13,7 @@
 	apb "source.monogon.dev/metropolis/node/core/curator/proto/api"
 	cpb "source.monogon.dev/metropolis/proto/common"
 
-	"source.monogon.dev/metropolis/pkg/event/memory"
+	"source.monogon.dev/osbase/event/memory"
 )
 
 // TestCurator is a shim Curator implementation that serves pending Watch
diff --git a/metropolis/test/util/rpc.go b/metropolis/test/util/rpc.go
index e4caece..030d8d0 100644
--- a/metropolis/test/util/rpc.go
+++ b/metropolis/test/util/rpc.go
@@ -9,7 +9,7 @@
 	"testing"
 
 	"source.monogon.dev/metropolis/node/core/identity"
-	"source.monogon.dev/metropolis/pkg/pki"
+	"source.monogon.dev/osbase/pki"
 )
 
 // NewEphemeralClusterCredentials creates a set of TLS certificates for use in a
diff --git a/metropolis/test/util/runners.go b/metropolis/test/util/runners.go
index bb7aa91..95de02a 100644
--- a/metropolis/test/util/runners.go
+++ b/metropolis/test/util/runners.go
@@ -9,7 +9,7 @@
 	"testing"
 	"time"
 
-	"source.monogon.dev/metropolis/test/launch"
+	"source.monogon.dev/osbase/test/launch"
 )
 
 // TestEventual creates a new subtest looping the given function until it either